A new poll by Media Research Center/McLaughlin & Associates, reported first by Axios' Alayna Treene, showed the attacks are working: 65% of self-described conservatives believe that social media companies purposely censor the right.

A Trump operative tells me: "It's risen to the level of being an emotional or gut issue with conservatives, like guns/immigration. It's an issue that's here to stay."

Be smart: Conservatives charged bias and lies in mainstream news and then created right-wing alternatives. It should come as no surprise if they do the same two-step process to the modern form of distributing that news.

Donald Trump Jr., who has 3 million Twitter followers and 1.3 million Instagram followers, told me there is "exactly zero doubt in my mind" that tech bias is real: "I don't think [this issue] is going away, because I don't think it's changing."

The president's oldest son, reflecting Trumpworld's growing appetite for action against Big Tech, said the companies need to self-regulate better: "Many of these platforms get many benefits from the government."

Don Jr. tells Axios that if a Trump supporter in the tech world created a conservative, Facebook-like social network, he would urge Trump supporters to switch to it.

When I asked him if his father's 2020 campaign might build such a platform, Don Jr. said: "I'd love to do it. But what I would prefer is, take one of the two Silicon Valley conservatives and let them start it. And then I'd help promote the platform and be all over that."

House Majority Leader Kevin McCarthy (R-Calif.), the likely Speaker if the GOP keeps the House, has driven the tech-bias issue among conservatives for months, and pushed a #StopTheBias hashtag that the president tweeted yesterday.

McCarthy told me: "The companies cannot sit back and say nothing is happening. Algorithms are written by people. Everybody has some bias in them. Anyone claims they don't have bias, they're not human."

McCarthy — who has had many conversations with Twitter CEO Jack Dorsey, and gives him credit for engaging on an issue many in the industry have dodged — said: "People are using the power of their own philosophy in a tool that was created to level the playing field ... the Internet itself."

On the idea of a conservative social platform, McCarthy said he'd rather fix the ones we have: "If we're only talking to people we agree with, that's not healthy for this country."

Why it matters: Top Republicans tell us this will be a major line of escalated attack at a congressional hearing next week with Facebook COO Sheryl Sandberg and Dorsey.

Axios managing editor Kim Hart told me: "Trump has essentially hijacked the upcoming hearings. Classic Trump tactic that will likely rain on [the senators' intended] parade on the disinformation front, and shift the focus to something that ... resonates more with his base."

The takeaway: Axios' Dan Primack said on his "Pro Rata" podcast: "What Trump’s doing here seems to be part of a larger trend of discrediting not just specific media outlets or specific stories, but the idea of media in general."